# Using Syphon Block

**URL:** https://discourse.libcinder.org/t/using-syphon-block/719
**Category:** Using Cinder
**Created:** [June 8, 2017, 8:58pm UTC](https://discourse.libcinder.org/t/using-syphon-block/719 "2017-06-08T20:58:15Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![katsully](https://avatars.discourse-cdn.com/v4/letter/k/34f0e0/32.png) [@katsully](https://discourse.libcinder.org/u/katsully)
#### Post date: [June 8, 2017, 8:58pm UTC](https://discourse.libcinder.org/t/using-syphon-block/719/1 "2017-06-08T20:58:15Z")

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I am on the master branch of Cinder (and just pulled today), but I’m unable to get the Syphon block ([https://github.com/rezaali/Cinder-Syphon](https://github.com/rezaali/Cinder-Syphon)) to work. I’m getting the error:

boost/signals2.hpp file not found

How do I fix this issue?

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### Author: ![hperigo](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.libcinder.org/hperigo/32/409_2.png) [@hperigo](https://discourse.libcinder.org/u/hperigo)
#### Post date: [June 9, 2017, 12:55am UTC](https://discourse.libcinder.org/t/using-syphon-block/719/2 "2017-06-09T00:55:36Z")

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Hi ketsully,

boost/signals2.hpp is not used by cinder anymore, that’s why you get an error.

I had the same issue a while ago, it’s fixed in here:

> **[Hperigo/Cinder-Syphon](https://github.com/Hperigo/Cinder-Syphon)**
>
> Syphon Implementation for Cinder 0.9.0+. Contribute to Hperigo/Cinder-Syphon development by creating an account on GitHub.

There are a couple of methods for publishing textures that are not working, but if you do it like this it should:

```
    vec2 syphonSize = { 2160,1080 };
    mSyphonServer.bind( syphonSize );
    gl::draw( tex, Rectf(0,0, syphonSize.x, syphonSize.y) );
    mSyphonServer.unbind();
```

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### Author: ![katsully](https://avatars.discourse-cdn.com/v4/letter/k/34f0e0/32.png) [@katsully](https://discourse.libcinder.org/u/katsully)
#### Post date: [June 12, 2017, 9:03pm UTC](https://discourse.libcinder.org/t/using-syphon-block/719/3 "2017-06-12T21:03:27Z")

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Thank you!! I’ll try it out